In "Predictability by Construction: Meeting Programmers' and Architects' Concerns," Kurt Wallnau makes the point that we have the technology to produce software that has predictable behavior, but that doing so requires a better understanding of the economics of confidence and better integration of architecting and programming. In "Walking across the Seam," Philippe Kruchten makes the counterpoint that in practice, the seam between software architecture and implementation has not been filled by architecture description languages, but more pragmatically by people, constantly commuting across that seam.